{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4101-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4101-8","canonicalUrl":"https://aoctrl.com/siemens/5SY4101-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4101-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON, miniature circuit breaker, 1-pole, D tripping characteristic, 10 kA per EN 60898, 35 kA per IEC 60947-2, 400 V AC, 1 MW unit.","salesMarkdown":"Rated 10 kA per EN 60898 and 35 kA per IEC 60947-2 at 400 V AC, it's got the interrupting capacity for industrial panels where fault currents run high. It's a 1 MW unit (18 mm wide), so it takes up one slot on the DIN rail. The quick-assembly system means it snaps on and off without tools, which saves time when you're populating a panel or swapping a failed breaker out here in the grease. The D tripping characteristic is the headline here. The thermal trip handles sustained overloads, while the magnetic trip reacts to short circuits. On a D-curve, the magnetic trip is set to activate at 10 to 20 times the rated current, so it won't drop out on a motor starting surge but will clear a hard fault fast. Rated for 400 V AC (single-phase) and 440 V AC multi-phase, plus 60 V DC (72 V DC max). The DC rating is useful for control circuits or battery-backed loads, though it's primarily an AC breaker. The operating frequency is 50/60 Hz, standard for global installations. The surrounding humidity limits are 95% up to 55 °C, then derated above that. IP20 protection with conductors connected — that's standard for a DIN-rail MCB in an enclosed panel. It's not for washdown areas; keep it behind a gland plate or cabinet door. Sealable per the spec, so you can lock it out for LOTO procedures. One modular width (18 mm) on a standard DIN rail. Mounting position any orientation — vertical, horizontal, upside down, doesn't matter. The quick-assembly system lets you snap it onto the rail and remove it with a screwdriver lever, no prying or rail damage.","metaTitle":"5SY4101-8 SENTRON MCB, 1P, D-curve, 10 kA","metaDescription":"Siemens 5SY4101-8 SENTRON miniature circuit breaker, 1-pole, D characteristic, 10 kA (EN 60898), 35 kA (IEC 60947-2), 400 V AC. Available to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"18 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P","Number Of Poles":"1","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"400 V","at DC rated value":"60 V","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"1","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"D","according to EN 60898 rated value":"10 kA","according to IEC 60947-2 rated value":"35 kA","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","Type Of Voltage Of The Operating Voltage":"AC","at DC according to IEC 60947-2 rated value":"15 kA","Value Range Of The Supply Voltage Frequency":"50/60 Hz","operating voltage at DC rated value maximum":"72 V","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 V","at AC according to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","supply voltage with single-phase operation at AC rated value":"230 V","power loss [W] for rated value of the current at AC in hot operating state per pole":"1.1 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$17.78","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=528518&mlfb=5SY4101-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4101-8/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY4101-8 and how do I get a price?","answer":"We source the 5SY4101-8 through our independent distribution channels. Submit an RFQ for current pricing and availability — we confirm both at quote time."},{"question":"What compliance documentation does the 5SY4101-8 carry?","answer":"It complies with IEC / EN 60898-1, IEC / EN 60947-2, and UL 1077 / CSA C22.2 No. 235. The interrupting ratings differ by standard: 10 kA per EN 60898, 35 kA per IEC 60947-2, and 5 kA per UL 1077. It's also halogen-free and silicon-free."},{"question":"What is 5SY4101-8's listed depth?","answer":"The overall depth is 76 mm, with an installation depth of 70 mm. That's standard for a 1 MW SENTRON MCB and fits most shallow enclosures."},{"question":"What is 5SY4101-8's listed width?","answer":"18 mm — one modular width on a standard DIN rail. It occupies a single slot in the distribution board."},{"question":"Will 5SY4101-8 drop into a panel specified around 5SY4140-7 without rewiring?","answer":"Both are 1-pole SENTRON MCBs on an 18 mm footprint, so the mechanical fit is the same — same DIN-rail clip, same terminal spacing. The difference is the tripping curve: the 5SY4140-7 is a B-curve (magnetic trip at 3-5x In), while the 5SY4101-8 is a D-curve (10-20x In). If the panel was designed for a B-curve, swapping to a D-curve changes the protection coordination — the D-curve allows higher inrush before tripping, which may not provide the same fault clearance for sensitive loads. Check the load type before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4101-8","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/5SY4101-8 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}